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प्रश्न
What are molecules?
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उत्तर
Molecules are made of atoms. Molecules exhibit the properties of that kind of matter and have independent existence.
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संबंधित प्रश्न
Classify the following into solid, liquid and gas:
Coal, kerosene, wood, oxygen, sugar, blood, water vapour, milk, wax.
Why do solids, liquids and gases differ in their physical states?
State the general properties of a solid.
Write whether the following statement are true or false.
A gas has no free surface.
The process by which a solid change into a liquid is called
Write true or false for the following statement
The inter-molecular forces are effective at all distances between the two molecules.
Write whether the following statement is true or false.
There is no difference between evaporation and boiling.
Identify the odd term out and explain.
Describe simple experiment to show that particles of matter have the intermolecular attraction
State the correct term from A, B, C, D, E or F in List II which represents the – change of state of matter or its relevant property from List I
| List I | List II |
| 1. Solid 'X' to a liquid 'Y' | A: Liquefaction |
| 2. Liquid 'Y' to its vapour 'Z' | B: Vaporization |
| 3. 'Z' to 'Y' | C: Melting |
| 4. 'Y' to 'X' | D: Solidification |
| 5. The temperature at which 'Y' changes to 'Z' | E: Melting Point |
| F: Boiling point |
